Furnace-grate



'grate embodying my improvements.

UNITED S11/wijs'y PATEN Ti OFFICE.

oHRIs'rIAN n. eAUsH, ou noLYoItn, Massaonusn'irs.

FU RNACEi-.G RATE.

SPECIFICATION forming part of Letters Patent No. 277,538, dated May 15, 1883.

Application filed March 23,1883. (Nomodel.)

To all whoma't may concern:

Be it known that I, CHRISTIAN H. BAUsII, a citizen of the United States, residing at Holyoke, in the county of Hampden and State of Massachusetts, have invented new and use-4 ful Improvements in Furnace-Grams, of which the following is a specification.

This invention relates Ito that class of furnace-grates in which loose independent gratebars are arranged upon supporting cross-bars, the object of the invention being to improve the construction of the bearing-frame, whereby it is madcadjustable to furnaces of different sizes; to improve the construction of the grate-bearin g cross-bars, whereby they are made less liable to warp, and to provide improved intermediate supports for the gratebars which are adjustable on said cross-bars.

In the drawings forming part of this specification, Figure I is an elevation partly in section, and Fig. II is a plan view, of a furnace- Fig. III is a plan view of one of the grate-supporting cross-hars, and Fig. IV is an end view thereof. Fig. V is an edge view of one of the legs of the frame. Fig. VI isa side view ot' one of said cross-bars. Fig. VII is a plan view of one of the grate-bar-dividing teeth.

In the drawings, a and I) indicate the two separate parts ofthe legs of the grate-frame, one, b, being provided with oblong slots, through which the screws .fr pass into the part a, whereby said two parts are secured to eachl other face to face, and provision is made for lifting and lowering the parts a, to adjust the grates to furnaces of different heights. Said legs of the frame are provided each with the stop d, adapted to be let into the side walls ot' the furnace, close to the bottom thereof, to prevent them from being lifted up, and with the catch c, which enters the floor c of the furnace, to keep the leg close against the side wall thereof. The upper end of each of the leg parts a is of fork shape, and adapted to receive in it one end of one of thebearing-bars A, as shown in Figs. I and II. The said legs are tied together by the adjustable horizontal string-piece, consisting of the parts m and a, which, like said legs, are provided 'with slots and screws to provide means for adjusting the frame in the direction of said string-pieces, to tit it to furnaces of different lcneths.`

The bearing-bars A, of' which there are two, are constructed of -the form shown in Figs. III and VI, of trough shape, and having through the base thereof a series ot perforations, fu, to allow of a circulation of air through them vertically, and to let ashes and cindersfall through them. When said bars A are in place `resting in the forked ends of the said legs, a

shoe, I), having a set-screw through each en d thereof, is placed near each end of said bars, and, being pushed closely against the face of the adjoining leg, it is there secured by said set-screw s, and thus said bearing-bars are retained in place on theframe, and provision is made for duly adjusting said bars and their bearing-points on the legs.

A series of movable teeth, t', is iitted to the groove in each bar A, said teeth having bases of rect-angular form, which prevents them from turning in said grooves;I but they may be moved therein in the direction of the length of the bearing-bars. Said teeth i are tapering from above the side iianges, tu, to'their upper ends, and are oval in cross-section, as

shown, and when placed in the bars A, in position to receive the grate-bars h, the lower edges of the latter rest upon the iianges w of' said teeth.

The teeth t may be made ot' suc-h thickness as to spread the grate-hars more or less, to adapt the openings between them to different kinds ot' fuel---that is tosay, tine or coarse coal-the frame and bearing-bars requiring no change; and since the bars lt and their supporting-teeth t' are not rigidly attached to the frame, less inconvenienceV from warping bars is experienced than when the bar-supporting parts are immovable.

XVhat I claim as my invention is- 1. In a furnace-grate, a supporting-frame having legs consisting of the parts a and b, adjustably secured one to the other, and having` the step d and catch c thereon, and forkshaped upper ends, and united by a horizontal string-piece consisting of the parts m and u, adjustably secured one to the otner, able teeth fi, having bases to lit the groovesin in combination with the bearing-bars A and said bars, and of the grate-bars h, substanro the adjustable sleeves D, substantially as set tially as set forth.

forth. t 1 T 2. The combination, in a furnace-grete,of a GHIJSUAN H' BALSH' supporting-frame therefor, substantially as de- Witnesses: scribed, of the grooved bearing-bars A, hav- WM. H; GHAPIN,

ing perl'ortions n through them, of the mov- R. F. HYDE. 

